31 results about "Trimethylolpropane trimethacrylate" patented technology

The invention relates to the technical field of cable accessories, in particular to a high-strength cable accessory and a preparation method thereof. The high-strength cable accessory comprises a semiconductor layer and an insulating layer, and the semiconductor layer is prepared from, by weight, 10-15 parts of low-density polyethylene, 75-85 parts of polyolefin thermoplastic elastomer, 8-12 parts of ethylene propylene diene monomer, 25-40 parts of silane coupling agent grafted graphene nanosheets and 4-6 parts of maleic anhydride grafted modified ethylene-octylene copolymer. The composition comprises the following components in parts by weight: 1.0-2.0 parts of zinc stearate, 1.0-2.0 parts of an antioxidant, 2.0-3.5 parts of trimethylolpropane trimethacrylate and 1.5-2.2 parts of dicumyl peroxide. According to the high-strength cable accessory provided by the invention, the overall mechanical property, thermal stability and conductivity of the composite material and the mechanical strength, breakdown field strength and insulating property of the insulating layer are improved.

Hoses include inner tube, a reinforcement layer disposed outwardly from the inner tube, and a cover layer disposed outwardly from the reinforcement layer, and the cover layer and / or inner tube is based on a cured composition formed from a mixture containing a blend of chlorinated polyethylene (CPE) and cross-linkable oxidized high density polyethylene (oxidized HDPE), where the CPE and oxidized HDPE are blended in a CPE:oxidized HDPE weight ratio of from 10:1 to 1:1, and a peroxide curing system. The peroxide curing system used in some compositions according the disclosure include alpha-alpha-bis(t-butylperoxy)diisopropylbenzene and trimethylolpropane trimethacrylate.

The present application belongs to the technical field of cable material, and particularly relates to a resin composition, a cable insulation material, a cable and a preparation method. The resin composition comprises polyethylene, a crosslinking agent and a crosslinking aid. The crosslinking agent is selected from one or more of triallyl isocyanurate, trimethylolpropane trimethacrylate and trimethylolpropane triacrylate. The crosslinking aid is selected from one or more of triphenyl phosphite, dipropylene glycol diacrylate and tetraethylene glycol diacrylate. The cable insulation material made of the resin composition has a high irradiation crosslinking rate, which can significantly improve the irradiation processing speed of the subsequent cable and improve the cable output efficiency. In addition, the cable insulation material has good aging resistance, can meet the long service life requirement, saves the cable update cost and has good economic benefits.

The present application relates to the field of interlayer film of laminated glass, and particularly relates to an ionic safety interlayer film of laminated glass and a preparation method thereof. The components of the interlayer film include ethylene methacrylic acid copolymer metal salt, coupling agent, initiator, trimethylolpropane trimethacrylate, grafting monomer, chain extender and molecular weight regulator; the preparation method includes the following steps: mixing the ethylene methacrylic acid copolymer metal salt, initiator and grafting monomer in a high-speed mixer to obtain a first mixture; mixing the first mixture, coupling agent, trimethylolpropane trimethacrylate, chain extender and molecular weight regulator in a high-speed mixer to obtain a second mixture; and inputting the second mixture into a screw extruder to extrude the ionic safety interlayer film of laminated glass. The ionic safety interlayer film of laminated glass has low raw material cost and high tensile strength, and is suitable for laminated glass of high safety demand facilities.

The application belongs to the technical field of paint coating, and particularly relates to a high-stability UV and moisture dual-curing three-protection paint and a preparation method thereof, which comprises, based on the total amount of raw materials, 25.5-77.9 wt% of 3,3,5-trimethylcyclohexyl acrylate, 20-54 wt% of polyurethane acrylate with an isocyanate group, 1-8.5 wt% of an auxiliary stable crosslinking agent, 0.1-5 wt% of a dehydrating agent, and 1-7 wt% of a photoinitiator; the weight ratio of the polyurethane acrylate to the 3,3,5-trimethylcyclohexyl acrylate and the auxiliary stable crosslinking agent is 1:(1.10-1.40):(0.05-0.30); and the auxiliary stable crosslinking agent is selected from trimethylolpropane triacrylate and / or trimethylolpropane trimethacrylate. The application has the properties of UV and moisture dual curing, and has high stability and can resist acid and alkali environments.

This invention relates to the field of battery materials technology, disclosing sulfur-containing polymer battery materials, positive electrode sheets, their preparation methods, and lithium-sulfur batteries. The preparation method of the sulfur-containing polymer battery material includes: crosslinking and curing molten sulfur with trimethylolpropane trimethacrylate at a mass ratio of 1-4:1. In the polymer S-TMPTMA obtained by this method, the O atoms in the C=O functional groups act as electron-rich active sites, effectively chemically adsorbing relatively electron-poor lithium from the lithium polysulfide intermediate during the lithium-sulfur electrochemical reaction, thereby alleviating the dissolution of lithium polysulfides in ether-based electrolytes and reducing the influence of the "shuttle effect." In a preferred embodiment, this polymer is used as a printing ink to manufacture electrodes via 3D printing, and these electrodes exhibit excellent electrochemical performance.

This invention relates to a collagen-moisturizing soft hydrophilic contact lens, belonging to the field of contact lens technology. The collagen-moisturizing soft hydrophilic contact lens of this invention comprises the following components: hydroxyethyl methacrylate, N-vinylpyrrolidone, N,N-dimethylacrylamide, methyl acrylate, collagen, polyethylene glycol 400, polyvinylpyrrolidone K90, azobisisobutyronitrile, azodimethylvaleronitrile, benzoyl peroxide, ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, and divinylbenzene. This invention solves the problems of rapid decay of moisturizing effect, poor biocompatibility, and low long-term wearing comfort of existing contact lenses through the synergistic effect of a complex hydrophilic monomer system, collagen functional components, a gradient complex initiation system, and a multi-dimensional complex cross-linking system.

The present application relates to the technical field of hose manufacturing, in particular to a PVC hose resistant to heat and high pressure and a preparation method thereof. The PVC resin powder is added as a plastic matrix; the plasticizer DOTP is added to plasticize and soften; the calcium carbonate is added to play a role of reinforcing filling; the carbon black is added to shield ultraviolet rays and dye; the calcium-zinc composite stabilizer is added to prevent the PVC from thermal decomposition; the chlorinated polyethylene is added to provide a rubber phase for the material and increase elasticity; the processing aid ACR resin is added to reduce processing temperature, promote plasticization and improve material toughness; the dicumyl peroxide is added to oxidize and break chains as an initiator; the trimethylolpropane trimethacrylate is added to promote vulcanization and crosslinking; and the triallyl isocyanurate is added to play a crosslinking role. The modified zirconium phosphate is further added, the modified zirconium phosphate loaded with iron ions is added to PVC powder, and the heat and high pressure resistance of the PVC hose is improved.

The application relates to an iminodiacetic acid type chelating resin and a preparation method and application thereof, and the preparation method comprises the following steps: (1) in the case that the stirring speed is 200-350 r / min, two dispersants are dissolved in water, then ethylbenzene, glycidyl methacrylate, trimethylolpropane trimethacrylate, isooctane and di-t-butyl peroxide are added, the raw materials are reacted after ultrasonic mixing, centrifugal separation is carried out after the reaction is completed, the filter cake is cleaned and dried, and resin microspheres are obtained; (2) in the stirring state, the resin microspheres obtained in the step (1) are added into water, then iminodiacetic acid is added, stirring is continued, then preliminary reaction is carried out by heating, NaOH is further added, reaction is carried out by heating, after the reaction is completed, filtration, cleaning and drying are carried out, and the iminodiacetic acid type chelating resin is obtained. The chelating resin particle size can be controlled, the particle size is relatively large, the specific surface area is large, the adsorption capacity is high, and the chelating resin can be used for adsorbing lead ions in heavy salt matrix.

The application discloses a medical dilator PP material and a preparation method thereof, relates to the technical field of high-performance polypropylene materials, and belongs to the patent classification C08L23 / 12. The method comprises the following steps: firstly, calcining and silanizing surface modification are performed on nano-hydroxyapatite to obtain silanized nano-hydroxyapatite with surface grafted amino groups; then, polypropylene, the modified nano-hydroxyapatite and maleic anhydride grafted polypropylene are premixed, melt blended through a double-screw extruder and granulated to prepare base composite material particles; the base particles are mixed with a dibenzyl sorbitol nucleating agent and trimethylolpropane trimethacrylate, and then injection molding is performed, and annealing treatment is performed on the sample; finally, electron beam irradiation is performed on the sample under an inert atmosphere, and the medical dilator PP material is obtained after standing and stabilization. The medical dilator PP material prepared by the method has excellent mechanical strength.

The invention provides an acrylic resin assistant for a cathode electrophoretic coating and a preparation method thereof, and belongs to the technical field of coatings, microgel particles in the acrylic resin assistant for the cathode electrophoretic coating have a shell-core structure, and the microgel particles comprise a hard core component and a soft shell component; the crosslinking monomer comprises at least one of trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, trimethylolpropane trimethacrylate, ethylene glycol dimethacrylate, zinc diacrylate and zinc dimethacrylate; the functional monomer comprises at least one of diacetone acrylamide, ethyl acetoacetate methacrylate, glycidyl methacrylate and dimethylaminoethyl methacrylate. Under the electric field intensity of 10-100V / cm, the film thickness of the sharp edge part of the prepared nano-emulsion reaches 85 + / -3% of that of a plane area; after curing, the pencil hardness at the edge of the film is greater than or equal to 2H, and the salt spray resistance is greater than or equal to 1200h; and the storage stability of the emulsion is more than 12 months.

This invention relates to the field of power cable materials technology, and discloses an anti-scorching agent and composition, a semi-conductive shielding material, its preparation method, and its application. The anti-scorching agent comprises structural units provided by monomer A and structural units provided by monomer B; monomer A is 3-[(4-phenylaminophenyl)amino]-2-hydroxypropyl methacrylate, and monomer B is selected from trimethylolpropane trimethacrylate or pentaerythritol triacrylate; the molar ratio of monomer A to monomer B is 1:(2-4). This anti-scorching agent can achieve the anti-scorching effect of the semi-conductive shielding material and is beneficial for long-term extrusion.

The invention relates to the technical field of silicone rubber, in particular to a modified silicone rubber material and a preparation method thereof. The preparation method comprises the following steps: 1, contacting white carbon black with water vapor for primary heat treatment to obtain dechlorinated white carbon black, and then contacting the dechlorinated white carbon black with water and a modifier for secondary heat treatment to obtain modified white carbon black; 2, tabletting raw silicone rubber, the modified white carbon black, a heat-resistant additive, a vulcanizing agent and a vulcanizing aid to obtain a mixed rubber sheet, and vulcanizing the mixed rubber sheet to obtain a modified silicone rubber material; the vulcanizing agent comprises at least one of dicumyl peroxide, bis (tert-butylperoxy) isopropyl benzene and 2, 4-dichlorobenzoyl peroxide; the vulcanizing aid is prepared from at least one of N, N '-m-phenylenedimaleimide, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate and diallyl phthalate. The method provided by the invention can make the silicone rubber material have good mechanical properties at normal temperature and excellent compressive deformation resistance at high temperature.

The invention provides a battery pole piece, a lithium ion battery and a preparation method of the lithium ion battery. Specifically, a coating is arranged on one side, far away from a current collector, of an active material layer of the battery pole piece; the coating is formed by crosslinking a first monomer, a second monomer, a binder and a photoinitiator; the first monomer is prepared from at least one of diethyl allyl phosphonate, triethyl phosphate, diphenyl phosphate, dimethyl methylphosphonate or melamine cyanurate; and the second monomer is prepared from at least one of ethoxylated trimethylolpropane triacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, tripropylene glycol diacrylate or trimethylolpropane trimethacrylate. The single and uniform coating not only helps to alleviate the problems of thermal runaway and cycle attenuation of the high-nickel ternary battery, but also does not need precise equipment in the preparation process, can be compatible with the existing lithium battery production line, and realizes collaborative optimization of thermal safety-cycle performance-mass production cost.

The invention provides a styrene-acrylic latex and a waterproof coating using the same, and the styrene-acrylic latex is prepared from the following raw materials in parts by mass: 530-600 parts of a soft monomer, 150-200 parts of a hard monomer, 15-25 parts of an amide monomer, 5-10 parts of a carboxylic acid monomer, 10-20 parts of a long carbon chain acrylate monomer and 1-5 parts of a crosslinking monomer; wherein the carbon atom number of the long-carbon-chain acrylate monomer is greater than or equal to 10; the cross-linking monomer comprises an inner cross-linking monomer or a normal-temperature self-cross-linking monomer; the internal crosslinking monomer comprises at least one of acetoacetoxy ethyl methacrylate, trimethylolpropane trimethacrylate and ethylene glycol dimethacrylate; the normal-temperature self-crosslinking monomer comprises at least one of adipic acid dihydrazide, diacetone acrylamide and ethylidene urea methacrylate.

The invention relates to the technical field of high polymer materials, and discloses an ethanol-resistant emulsion for fireproof fibers and a preparation method thereof. The emulsion is prepared from water, an SR-10 emulsifying agent, diacetone acrylamide, adipic dihydrazide, diallyl phthalate, trimethylolpropane trimethacrylate, methacrylic acid, octyl acrylate, styrene, acrylonitrile, vinyl trimethoxy silane, ammonium persulfate, tert-butyl hydroperoxide, D-sodium erythorbate, ammonia water and a sterilizing agent. The preparation method comprises the steps of emulsion preparation, heating reaction, adding of vinyltrimethoxysilane in batches, heat preservation, oxidation-reduction reaction, normal-temperature crosslinking and the like. According to the invention, the reactive emulsifier containing an ammonium group, the large-molecular-weight soft monomer and acrylonitrile with good solvent resistance are adopted for copolymerization, vinyl trimethoxy silane is added twice, and the prepared emulsion does not bubble, discolor and swell after being soaked in 50% and 75% ethanol aqueous solutions for 24 hours, and has good toughness.

The application belongs to the technical field of imprint adsorption materials, and particularly relates to a nanocellulose molecular imprinting aerogel for targeted separation of paclitaxel, and a preparation method and application thereof. The preparation method comprises the following steps: mixing defatted cotton and sulfuric acid, and performing acidolysis to obtain nanocellulose; mixing a sodium alginate solution, a nanocellulose solution and an inorganic calcium salt solution, and performing crosslinking and drying to obtain nanocellulose aerogel; mixing 3-(methacryloyloxy)propyl trimethoxysilane, anhydrous ethanol, glacial acetic acid and nanocellulose aerogel, and performing silanization reaction to obtain silanized nanocellulose aerogel; mixing paclitaxel, acrylamide, azobisisobutyronitrile, trimethylolpropane trimethacrylate and the silanized nanocellulose aerogel, and then performing polymerization reaction, and then removing a template to obtain the nanocellulose molecular imprinting aerogel. The preparation method is simple, and has high targeting for paclitaxel.

The invention discloses a medical dilator PP material and a preparation method thereof, relates to the technical field of high-performance polypropylene materials, and belongs to the patent classification number C08L23 / 12. The method comprises the following steps: firstly, carrying out calcination and silanization surface modification on nano-hydroxyapatite to obtain silanization nano-hydroxyapatite of which the surface is grafted with amino; then, polypropylene, the modified nano-hydroxyapatite and maleic anhydride grafted polypropylene are premixed, melt blending and granulation are performed through a double-screw extruder, and basic composite material particles are prepared; and mixing the basic particles with a dibenzylidene sorbitol nucleating agent and trimethylolpropane trimethacrylate, carrying out injection molding, and carrying out annealing treatment on a sample strip. And finally, carrying out irradiation crosslinking on the sample strip by adopting an electron beam in an inert atmosphere, and standing for stabilization to obtain the medical dilator PP material. The medical dilator PP material prepared by the invention has excellent mechanical strength.

The present application relates to a kind of metal packaging scratch-resistant coating and its preparation method, belong to coating technical field, the coating includes: maleic anhydride modified epoxy resin, methyl acrylic acid, trimethylolpropane trimethylacrylate, cis-13-docosene acid, diacrylic acid-1,6-hexanediol ester, compound filler, acetone, benzoyl peroxide, polyamide and auxiliary agent.The present application is with maleic anhydride modified epoxy resin as system introduction epoxy group to improve crosslinking density, simultaneously, with trimethylolpropane trimethylacrylate to further improve crosslinking density, on this basis, cis-13-docosene acid is also added to reduce system friction coefficient, the coating prepared from this has outstanding scratch resistance and hardness;In addition, the compound filler of the present application also has positive effect on enhancing the scratch resistance of coating;And maleic anhydride modified epoxy resin and diacrylic acid-1,6-hexanediol ester can provide excellent adhesion for coating.

The invention discloses a solar cell packaging film and a preparation method thereof. The solar cell packaging film is prepared by mixing an ethylene-vinyl acetate copolymer, benzoin dimethyl ether, trimethylolpropane trimethacrylate and an additive and then performing hot-pressing film forming, wherein the additive comprises phthalate, a hindered phenol antioxidant and epoxy linseed oil acrylate. The preparation method comprises the following steps: mixing the ethylene-vinyl acetate copolymer, the benzoin dimethyl ether, the trimethylolpropane trimethacrylate and the additive to obtain a film-forming raw material; and carrying out hot pressing on the film-forming raw material to obtain the packaging film. By adding a small amount of the phthalate, the hindered phenol antioxidant and the epoxy linseed oil acrylate composition, the ultraviolet crosslinking temperature of the EVA adhesive film can be remarkably reduced, the EVA adhesive film can be firmly adhered to the surface of a battery piece, and high-temperature damage to the battery piece can be avoided due to the relatively low hot pressing temperature; the method is especially suitable for packaging a traditional perovskite battery piece with poor heat resistance.

The invention relates to a scratch-resistant paint for metal packaging and a preparation method thereof, and belongs to the technical field of paints.The paint is prepared from maleic anhydride modified epoxy resin, methacrylic acid, trimethylolpropane trimethacrylate, cis-13-docosaenoic acid, 1, 6-hexanediol diacrylate, compound filler, acetone and benzoyl peroxide, polyamide and an auxiliary agent. According to the invention, maleic anhydride modified epoxy resin is used as a system to introduce an epoxy group to improve the crosslinking density, meanwhile, trimethylolpropane trimethacrylate is used for assisting to further improve the crosslinking density, and on the basis, cis-13-docosaenoic acid is added to reduce the friction coefficient of the system; the coating prepared by the method has outstanding scratch resistance and hardness; in addition, the compound filler provided by the invention also has a positive effect on enhancing the scratch resistance of the coating; the maleic anhydride modified epoxy resin and the 1, 6-hexanediol diacrylate are selected, so that excellent adhesive force can be provided for the coating.

The application discloses a maleic anhydride grafted adhesive resin for PPR / PA composite pipes and a preparation method thereof. The adhesive resin comprises a base polyolefin resin, maleic anhydride, an initiator, a grafting efficiency promoter, a side reaction inhibitor, a long-acting antioxidant, a lubricant and a water-resistant agent. The base polyolefin resin comprises at least one of random copolymerized polypropylene PPR, block copolymerized polypropylene PP-B and linear low-density polyethylene LLDPE. The grafting efficiency promoter is at least one of triallyl isocyanurate TAIC, trimethylolpropane trimethacrylate TMPTMA and divinylbenzene DVB. The side reaction inhibitor adopts a compound system of a hindered phenol antioxidant and a phosphite antioxidant. The application can solve the technical problems of insufficient bonding strength, poor high-temperature aging resistance and water resistance, poor processing thermal stability and insufficient base material adaptability when the adhesive resin is used for PPR / PA12 composite.

The application belongs to the technical field of new materials, and particularly relates to a low-odor TPV material and a preparation method thereof. EPDM rubber, PP resin, a processing aid, color masterbatch and white oil are mixed and granulated to obtain a masterbatch; the masterbatch is dynamically vulcanized in the presence of a vulcanizing agent and a vulcanization accelerator to obtain the low-odor TPV material; the vulcanization accelerator comprises one or both of trimethylolpropane trimethacrylate and trimethylolpropane triacrylate. In the prior art, a method of adsorption treatment is mostly used to reduce the odor of TPV, and obvious defects exist. The application develops a new formula on the basis of the TPV system, effectively reduces the odor, and maintains good mechanical properties of the material. The application uses di-tert-butyl peroxide isopropyl phenyl (BIBP) in combination with trimethylolpropane trimethacrylate and trimethylolpropane triacrylate for EPDM rubber / PP resin / white oil, and extrusion granulation is performed to obtain the low-odor TPV material. Conventional detection finds that the odor grade of the TPV material is as low as 1, and the problem of odor emission of the TPV material is solved.

The application relates to the technical field of food detection, in particular to a special medical food vitamin B12 enrichment and detection material and method based on magnetic molecular imprinting. The material is a magnetic molecular imprinting polymer (MMIPs), which takes Fe3O4 as a magnetic core, is coated with a SiO2 layer and a KH570 coupling agent in sequence, and is coupled with a vitamin B12 imprinting polymer layer through surface molecular imprinting technology. The imprinting polymer layer is polymerized from a template molecule vitamin B12 (CNcbl), a functional monomer methacrylic acid (MAA) and a crosslinking agent trimethylolpropane trimethacrylate (TRIM). The material of the application realizes specific recognition through molecular imprinting technology, and simplifies a separation step by using superparamagnetism, so that the cost is significantly reduced and the efficiency is improved.

This application provides an insulating and flame-retardant cross-linked polypropylene foam material and its preparation method, belonging to the field of polypropylene foam materials. A flame-retardant synergistic masterbatch is prepared by grafting maleic anhydride onto aluminum diethylphosphonate, melamine polyphosphate, modified montmorillonite, calcium borate, and a portion of EPDM rubber. An irradiation-sensitized masterbatch is prepared by grafting maleic anhydride onto a portion of ethylene-1-octene block copolymer, triallyl isocyanurate, and trimethylolpropane trimethacrylate. This masterbatch is then mixed with homopolymer polypropylene, the remaining components, and azodicarbonamide, and subjected to dynamic radiation cross-linking extrusion, low-energy electron beam gradient irradiation cross-linking, and staged high-temperature foaming to obtain the product. This application solves the problems of premature decomposition of foaming agents, inhibition of foaming by flame retardants, and irradiation degradation of polypropylene by using a zinc-free formulation, masterbatch pre-dispersion, and dynamic and gradient irradiation synergistic cross-linking, achieving a balance between high flame retardancy, high insulation, and good foaming performance in cross-linked polypropylene foam materials.

The application relates to the technical field of polymer films, and specifically discloses a degradable polymer material, a preparation method thereof and a degradable polymer film. The degradable polymer material is mainly made of the following raw materials in parts by weight: 35-45 parts of polybutylene adipate terephthalate, 20-30 parts of modified starch, 10-20 parts of polydimethylsiloxane, 5-15 parts of trimethylolpropane trimethacrylate, 2-8 parts of a plasticizer and 2-8 parts of an antibacterial agent; the polydimethylsiloxane is vinyl-terminated polydimethylsiloxane; the modified starch is obtained by treating starch with 1-chlorohex-5-ene-2-ol and 1,2-epoxy chlorobutane. The degradable polymer film obtained from the degradable polymer material not only has good hydrophobicity and degradability, meets environmental protection requirements, but also has the advantages of high tensile strength, high right-angle tear strength and good light transmittance, meets market demands, has commercial application prospects and economic value.

This invention provides a 3D-printed gel composition for sports protective pads and its preparation method, relating to the fields of gel materials and 3D printing technology. The 3D-printed gel composition for sports protective pads of this invention comprises the following materials in parts by weight: 10-25 parts of trimethylolpropane trimethacrylate, 25-35 parts of polyurethane acrylate, 5-15 parts of acrylated eutectic solvent, 1-5 parts of methacrylated-β-cyclodextrin inclusion complex loaded with antibacterial agent, 5-10 parts of amine-modified polyether acrylate, and 0.1-5 parts of additives. This invention aims to solve the problems of poor tear resistance and easy fatigue collapse in existing 3D-printed foam pads due to the physical disruption of the cross-linking network by micropores, while also addressing the issues of traditional pads softening upon absorbing sweat and failing to provide adaptive support and intelligent long-lasting antibacterial properties based on the athlete's sweating state.

The present application relates to the technical field of polypropylene production, and in particular to a maleic anhydride grafted polypropylene and a preparation method thereof. The preparation method of the maleic anhydride grafted polypropylene comprises the following steps: weighing 100-120 parts of polypropylene, 4-5 parts of maleic anhydride, 0.6-0.8 parts of a grafting aid, 0.3-0.4 parts of an initiator and 0.1-0.2 parts of an antioxidant, uniformly mixing them, and then extruding and granulating through a double-screw extruder to obtain the maleic anhydride grafted polypropylene; wherein the grafting aid is compounded from trimethylolpropane trimethacrylate, ethylene-propylene-diene rubber and 4,4-dihydroxydiphenyl sulfide at a mass ratio of 1:(0.7-0.9):(0.8-1). The preparation method can significantly improve the grafting rate of the maleic anhydride grafted polypropylene, and significantly improve the compatibility of the polypropylene and polar materials. The maleic anhydride grafted polypropylene prepared by the present application is a good compatibilizer.

The application provides a bicycle synchronous belt surface wear-resistant coating and a preparation method thereof, and relates to the field of coating processing technology. The preparation method comprises the following steps: (1) reacting citric acid and 2-aminoethanethiol hydrochloride to obtain a pyridone ultraviolet absorption monomer; (2) sequentially reacting carbon black with KH550 and the pyridone ultraviolet absorption monomer to obtain modified carbon black; (3) sequentially reacting pre-irradiated polytetrafluoroethylene micro powder with maleic anhydride and dopamine to obtain modified polytetrafluoroethylene micro powder; and (4) mixing HNBR rubber, the modified polytetrafluoroethylene micro powder, the modified carbon black, trimethylolpropane trimethacrylate, stearic acid, an accelerator and a vulcanizing agent, and then coating the mixture on a fabric base belt by scraping, and finally obtaining the bicycle synchronous belt surface wear-resistant coating after vulcanization. The bicycle synchronous belt surface wear-resistant coating prepared by the preparation method has the advantages of wear resistance, strong adhesion and weather resistance.

The application belongs to the technical field of resin production, and particularly relates to a macroporous acrylic high-molecular polymer production method. The steps are as follows: adding gelatin, Tween 20 and hydroxyethyl cellulose into soft water to prepare water phase; mixing methyl acrylate, acrylonitrile, trimethylolpropane trimethacrylate, benzoyl peroxide and ethylene glycol dimethacrylate with toluene to prepare organic phase, adding the organic phase into the water phase, shearing and emulsifying to obtain emulsion, and polymerizing to obtain polymer spheres; finally, adding a mixed solution of crosslinking agent, benzoyl peroxide and propylene carbonate into the mixed solution again for crosslinking reaction to obtain high-molecular polymer. The application adopts specific reagents and secondary crosslinking, can realize preparation of macroporous high-molecular polymer, and can accurately control the pore structure to ensure the product performance. The prepared high-molecular polymer has high porosity and large pore size, and has excellent effect. Moreover, the operation is simple, and the industrial production can be easily realized, so the application has wide application prospect.